I will lend you the book as soon as I have done/ will have done with it.

1. I will lend you the book as soon as I have done with it.

2. I will lend you the book as soon as I will have done with it.


Are the both grammatical?

Only the first is correct.

You will also hear "I will lend you the book as soon as I am done with it".

"...... as soon as I am done with it." seems to be the most appropriate.

Quote:

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Originally Posted by rats

"...... as soon as I am done with it." seems to be the most appropriate.

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For me, the most appropriate would be "as soon as I have finished with it / as soon as I've read it". It's a matter of personal preference.

I wouldn't say either "I have done with it" or "I am done with it".

Nor would I, but you'll hear both. I, too, would say "I'll lend you the book when I've finished with it".

I would say "am done with it."

I would not say "have done with it." It makes me want to ask "have done what with it?"